粉体工学会誌
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
51 巻, 11 号
選択された号の論文の5件中1~5を表示しています
論文
  • 下野 圭亮, 門田 和紀, 戸塚 裕一, 下坂 厚子, 白川 善幸, 日高 重助
    1914 年 51 巻 11 号 p. 750-758
    発行日: 1914/11/10
    公開日: 2014/12/23
    ジャーナル フリー
    We studied the mechanisms of polymorphic transition and composite of amino acid particles in grinding process. When the glycine particles and alanine particles were ground separately, the crystal of glycine transferred from γ through amorphous state to β form. The amorphous composite materials of glycine and alanine were generated by co-grinding the glycine and alanine particles. The results indicate that alanine inhibits the polymorphic transition of glycine. We calculated the ball impact energy in grinding process by DEM simulation. The ball impact energy calculated from DEM revealed that the amorphization of alanine by co-grinding required larger energy than that of alanine by single grinding. We predicted the composition structures of composite particles by evaluating the dissolution profile of each sample. The results suggested that glycine, alanine particles and composite particles with amorphous and fine crystal state existed in the composite particles.
研究ノート
解説
解説 フロンティア研究シリーズ
  • 河府 賢治
    2014 年 51 巻 11 号 p. 772-777
    発行日: 2014/10/10
    公開日: 2014/12/23
    ジャーナル 認証あり
    In order to handle powders, ultrasonic vibration was used. Firstly, it was applied for plug conveying in horizontal pipe, and pressure drop was measured. As a result, pressure drop became smaller linearly with increasing ultrasonic vibration regardless of particles and flow conditions. Secondary it was shown that ultrasound could reduce friction between powder and wall, and it was affected by particle diameter. Additionally powders were able to be classified by using acoustic pressure. Finally, suspension of particle motion in air flow was confirmed calculatedly due to generation of ultrasonic standing wave. Results showed particles move to the node of standing wave and this effect depends on particle diameter, maximum acoustic pressure and vibration mode.
新・基礎粉体工学講座
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